I recently upgraded my xunit plugin to 3.0. I was presented with the following screen when upgrading:
That's fair enough, but there are no release notes to be found, at least not here: https://github.com/jenkinsci/xunit-plugin/releases
After upgrading the plugins functionality was removed from several (most?) projects but (at least) one retained it, but with empty settings. Building this project caused the build to fail probably caused by the empty settings.
I don't know if these are the symptom of a bug, because I have know idea what the release notes say. Maybe there's a procedure I should have followed, but I just don't know.
I've reverted to the previous version for now.